Loss of acceleration in 2nd gear suddenly.

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Nov 20, 2018 | 07:53 PM

Ironhide

Thread Starter

CMOC Rookie

Joined: Oct 2018

Posts: 38

From: Vancouver

Loss of acceleration in 2nd gear suddenly.

hey everyone, own a supercharged 2003 mustang Gt and after I accelerated from first to second the car just lost power while trying to accelerate. It didn’t turn off, but it wouldn’t accelerate as fast as I wanted it to. What’s going on? Engine light is on because I need to clean maf. Which I’m doing this weekend. It’s a stored vehicle. Any help would be really appreciated. It only happened during a hard acceleration.

Last edited by Ironhide; Nov 20, 2018 at 08:02 PM.

Nov 20, 2018 | 08:28 PM

Macgyver 4404

CMOC Newbie

Joined: Oct 2018

Posts: 23

From: Nobel, Ontario

Sounds like you might have blown off a hose somewhere, check all your SC connections. Check all your check engine codes. Good luck.

Nov 21, 2018 | 10:50 AM

Ironhide

Thread Starter

CMOC Rookie

Joined: Oct 2018

Posts: 38

From: Vancouver

Felt like a lag or sudden loss of power after shifting

Nov 22, 2018 | 02:50 PM

Mudlite

CMOC Rookie

Joined: Feb 2017

Posts: 35

From: Exeter Ontario

That sounds like fuel supply being starved, check fuel filter/fuel pressure.

Nov 22, 2018 | 03:22 PM

Ironhide

Thread Starter

CMOC Rookie

Joined: Oct 2018

Posts: 38

From: Vancouver

Ok thanks. I would if a faulty maf or iac would be causing this

Nov 22, 2018 | 03:39 PM

Macgyver 4404

CMOC Newbie

Joined: Oct 2018

Posts: 23

From: Nobel, Ontario

It's all connected, could be any or all mentioned.

Nov 22, 2018 | 04:14 PM

Mudlite

CMOC Rookie

Joined: Feb 2017

Posts: 35

From: Exeter Ontario

Did your car rev out OK in first gear ? Dieing in second sounds like fuel starvation. If it reved out OK in First then Maf and AIV are probably not the problem..in my opinion. Good luck figuring it out, let us know !